We discuss results of the implementation of a stochastic convection parameterization, based on these ideas, in the Navy global model (NOGAPS) ensemble system. It is shown that this method is able to generate substantial tropical perturbations that grow and “migrate” to the mid-latitudes as forecast time progresses, while moving from the small scales where the perturbations are forced to the larger synoptic scales.
We also utilize satellite observations, from the Atmospheric Infrared Sounder (AIRS), of temperature and humidity variance to constrain the stochastic parameterizations. In particular we discuss the climatology of variance as well as results of variance length scaling within the troposphere. The implications for parameterization development, stochastic parameterizations in particular, of the AIRS observations of higher moments of the distributions of temperature and humidity are explored in detail.
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